counting lines using fileinput module

[Robert]

I would like to count lines in a file using the fileinput module and I
am getting an unusual output.
------------------------------------------------------------------------------
#!/usr/bin/python
import fileinput

# cycle through files
for line in fileinput.input ():
if (fileinput.isfi rstline()):
if (fileinput.line no 1):
print "%8d lines" % (fileinput.line no()-1)
print "%s" % fileinput.filen ame()
print "%8d lines" % fileinput.filel ineno()
---------------------------------------------------------------------------------

This works fine except it prints "0 lines" first.
Can anyone help me understand why that is?

[Gabriel Genellina]

Re: counting lines using fileinput module

En Wed, 13 Feb 2008 23:47:11 -0200, Robert <robert.pena@gm ail.com>
escribió:

I would like to count lines in a file using the fileinput module and I
am getting an unusual output.
------------------------------------------------------------------------------
#!/usr/bin/python
import fileinput
>
# cycle through files
for line in fileinput.input ():
if (fileinput.isfi rstline()):
if (fileinput.line no 1):

You forget the () after lineno

--
Gabriel Genellina

[7stud]

Re: counting lines using fileinput module

On Feb 13, 6:47 pm, Robert <robert.p...@gm ail.comwrote:

I would like to count lines in a file using the fileinput module and I
am getting an unusual output.
--------------------------------------------------------------------------- ---
#!/usr/bin/python
import fileinput
>
# cycle through files
for line in fileinput.input ():
   if (fileinput.isfi rstline()):
      if (fileinput.line no 1):
         print "%8d lines" % (fileinput.line no()-1)
      print "%s" % fileinput.filen ame()
print "%8d lines" % fileinput.filel ineno()
--------------------------------------------------------------------------- ------
>
This works fine except it prints "0 lines" first.
Can anyone help me understand why that is?

if '<function lineno at 0x57e70>' 1:
print 'yes'

--output:--
yes


fileinput.linen o v. fileinput.linen o()

Whenever you have strange problems like that, insert a bunch of print
statements to verify that the values are what you think they should
be:


for line in fileinput.input ():
print line #<-------*****
if (fileinput.isfi rstline()):
print fileinput.linen o #<-------*****
if (fileinput.line no 1):
print "%8d lines" % (fileinput.line no()-1)
print "%s" % fileinput.filen ame()
print "%8d lines" % fileinput.filel ineno()

[Robert]

Re: counting lines using fileinput module

On Feb 13, 8:31 pm, 7stud <bbxx789_0...@y ahoo.comwrote:

On Feb 13, 6:47 pm, Robert <robert.p...@gm ail.comwrote:
>
>
>

I would like to count lines in a file using the fileinput module and I
am getting an unusual output.
--------------------------------------------------------------------------- ---
#!/usr/bin/python
import fileinput

>

# cycle through files
for line in fileinput.input ():
   if (fileinput.isfi rstline()):
      if (fileinput.line no 1):
         print "%8d lines" % (fileinput.line no()-1)
      print "%s" % fileinput.filen ame()
print "%8d lines" % fileinput.filel ineno()
--------------------------------------------------------------------------- ------

>

This works fine except it prints "0 lines" first.
Can anyone help me understand why that is?

>
if '<function lineno at 0x57e70>' 1:
    print 'yes'
>
--output:--
yes
>
fileinput.linen o  v. fileinput.linen o()
>
Whenever you have strange problems like that, insert a bunch of print
statements to verify that the values are what you think they should
be:
>
for line in fileinput.input ():
    print line  #<-------*****
    if (fileinput.isfi rstline()):
        print fileinput.linen o  #<-------*****
        if (fileinput.line no 1):
             print "%8d lines" % (fileinput.line no()-1)
        print "%s" % fileinput.filen ame()
print "%8d lines" % fileinput.filel ineno()

Thanks for the heads up. I hate it when that happens. Anyway, here is
the modified code:
-------------------------------------------------------
#!/usr/bin/python
import fileinput

file = ''
count = 0
# cycle through files
for line in fileinput.input ():
if (fileinput.isfi rstline()):
if (fileinput.line no() 1):
print "%20s has %8d lines" % (file, fileinput.linen o()-1)
file = fileinput.filen ame()
count = fileinput.linen o()-1 # needed this in case there is an
empty file at the end of list
print "%20s has %8d lines" % (file, fileinput.linen o()-count) # this
is for the last file
--------------------------------------------------------
I added count to keep track of the next to last file in the command
line list. The fileinput module opens then closes an empty file. If
there is a cleaner way to do something like this I would interested to
know. Thanks.